Answer:
<em>585lb</em>
Explanation:
Given the formula for calculating the magnitude of the resultant force as;
<em>Given </em>
<em></em><em></em>
<em>Hence the magnitude of the resultant force is 585lb</em>
7. Un niño tiene 35 kg esta sobre un trineo que tiene una masa de 5 kg. Si el niño y el trineo
1 answer:
Answer:
<em>El niño y el trineo se mueven a 3.61 m/s</em>
Explanation:
<em><u>Energía Cinética</u></em>
Un cuerpo de masa m que se mueve con rapidez v, posee una energía cinética de:
Se nos dice que un niño de 35 Kg está sobre un trineo de 5 Kg y ambos viajan juntos. La masa total del conjunto es m=40 Kg.
Además sabemos que su energía cinética es de 260 J y requerimos calcular su velocidad.
Eso lo haremos despejando v de la ecuación anterior:
v = 3.61 m/s
El niño y el trineo se mueven a 3.61 m/s
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Answer:
b Use a balance to determine the mass of the car. Use a motion sensor to measure the speed of the car at a time of 0s and at time of 5s .
Explanation:
The right way to measure the net force on the car is take the measurement of its mass then find the speed of the car within the time 0s to 5s.
This is because the net force acting on car is given as;
Force = mass x acceleration
By using the balance, the mass is determine
Acceleration is the rate of change of velocity with time.
Acceleration =
v is the final velocity
u is the initial velocity
t is the time taken
Now,
Force = mass x